Update Dockerfile

.github/workflows/release.yml

@@ -1,19 +0,0 @@
-name: Publish Docker image
-on:
-  push:
-    branches: [ master ]
-jobs:
-  publish:
-    name: Publish to GitHub Packages
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-      - name: Publish image to GitHub Packages
-        uses: docker/build-push-action@v1
-        with:
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-          registry: docker.pkg.github.com
-          repository: lowlighter/metrics/metrics
-          tag_with_ref: true